What a cracked flywheel sounds like

I had the noise for a couple of weeks and have been told it was a loose sepentine belt, the pulley, the Compressor for the ac, Belle Tire said my engine was blown. Diagnosis: Cracked Flywheel. Caught by the Dodge Dealership... 6 days and 6000 miles before my warranty expired. Repaited at 100% Chrysler.